(19)

(11)

EP 3 520 013 A1

(12)

(43) Date of publication: 07.08.2019 Bulletin 2019/32 (21) Application number: 17784566.6 (22) Date of filing: 27.09.2017

(51) International Patent Classification (IPC):  G06F 21/60(2013.01) H04L 9/32(2006.01) H04L 9/06(2006.01) (86) International application number: PCT/EP2017/074478 (87) International publication number: WO 2018/060236 (05.04.2018 Gazette 2018/14)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: MA MD (30) Priority: 30.09.2016 US 201615281631 (71) Applicant: International Business Machines Corporation Armonk, New York 10504 (US)	(72) Inventors: GREINER, Dan POUGHKEEPSIE, NY 12601-5400 (US) SLEGEL, Timothy POUGHKEEPSIE, NY 12601-5400 (US) ZOELLIN, Christian AUSTIN, TX 78758-3493 (US) (74) Representative: Williams, Julian David  IBM United Kingdom Limited Intellectual Property Law Mailpoint 110 Hursley Park Winchester Hampshire SO21 2JN Hursley Park Winchester Hampshire SO21 2JN (GB)